Burglar-detective apparatus



April 28, 1925.

T. C. GETTELL BURGLAR DETECTIVE APPARATUS File cYJan. 26, 1921 2 Sheets-Sheet 1 17mm Cfiettell,

fliivorneput Patented Apr. 28, 1925 UNITED. STATES,

f 1 5 1 1'1 PATIENT" TRAVILLA c. GETTELL, or PH I ADELPHIA', BENNSYL X I AItIAQASSIGhTOR orfoNE- HALF To rapnnnmox AM'BnEn, on B L'rIMoB-E," MARYLAND,

' y BTJRGLARV-DETEGTZIVEAPPARATUS.

- Application fil ed Januaryi2 6 1 921. Serial No. 440,045;

To all mm it mayconccmr Be it known that I, TRAVILLA, C. GETTE L, a citizen of the United States, residingin the city of Philadelphia, county of Philadelphia,'and State of Pennsylvania, have in} vented. certain new and useful Improvements in Burglar-Detective Ap'paratus, of which the followingjisa specification.

My invention is a burglar detective aps paratus adapted for use in conjunction with a show window and comprises a curtain therefor and means whereby, when the glass is broken, electric circuits are closed, an alarm is sounded, and the curtain is lowered and charged with static-electricity adapted for shocking and holding onecoming in contact therewith,

The nature and characteristic features of,

the invention are fully 'set forth in the 'following description 'andthe accompanying drawings in illustration thereof. I

In the drawings, Fig. 1 is a broken vertical sectional view taken through a window equipped with my improvements; Fig. 2i's a sectional view takenon the line 2 2 of Fiai 1' and Fin. is a dia rammatic view 4. 7 o b r v ,jacent to the top of the window has rolled thereon a curtain 5, comprising conducting V the circuits are normally open, but 'when thc conducting-bar 13 is, disturbed, as'fby the 7 breaking of the window, the" bar is brought material as tin foil, which is 'conn'ectedby cords 6 with a roller 7 journalled in brackets 8 fixed to the frame adjacent to the bottom of the window. I r

The rollers 3 and 7 are provided with the similarly acting springs '9'and 9 tending to draw the curtain 5 down'overthe-w1ndow,-

the curtain being normallyvheld rolled up and the springs under tension by the engagement of the radial finger 10 with the I armature 11 of an electromagnet 12.

' A source of electric energy as the battery 17, has one of its poles connected with the bearings 1i through the conductor 18, (hav- "lock and the branch conductors 19 and,

16 on opposite ing in its circuit vthe coil of the electromagnet 12), and the branch cond'uctors 1S1 and 18 The other pole of the battery is connected with the terminals '.1 6:t hroigh a conducto-r19 (having inz tscircuit a switch 19. A branch conductor 21 tappedofi' the conductor 18 ,isconnected with a bell22; ,a conductor-'23 connecting the bell with the "core 2&ofn-an electromagne't 25. v is connected:through the conductors 26 and; v

This", core 27 with thecoil of theelectromaguet and therethrough and the conductor 28iwith'the conductor Thecoreis also connected by the conductors 26-and. 29 :with the branch conductor 18 K, The armature 30; of the A second source of eleotric energyfaslthe' battery 31, has one o'titsipoles connected by the conductor 32 withthe 6011 33-lot the armature 12, and ,itsjother pole connected by therconductor 34: with theiarmature 11,

the conductor 34 rhaving in its circuit the shocking vibrator 35. Abranch conductor 36 connects; the conductor 34 with the "conducting bracket 4; and gtherethrough with the roller 3 and, curtain "5,; A, terminal of the electrfimagnet 25 is" connected with the con ductor 1'9. i

secondary coil of the -shocking vibrator 35, i

is connected by a conductor 37 with the" ground and by a branch, 38 'withjthe layer of;

tinfoil 39 on the window" sill orffloor adjacent to the window In the operation of my into contact with one of theadjacent terininals 16 and current fiows'froin theiposi 18, electro-magnetic ,coil 12, branch conductors Is and 18 bearings l4, rodfl13, terminals ".16, branchconductors 19, and 19 switch lock 20fand conductor 19 to thenegative pole otthe battery. Current also flows from the, positive. pole of the battery through the. conductor 21, bell 22,

conductor 23, core 24:, conductors 2 6 :and-2T, co1l'25 and conductor '28, and through the conductors 29 and 18 to-the conductor 18 which is connected through thejcircuit above described with the negativepolebfthebattery, whereby the bell is operated and the electro-niz'ignet 25 is eXcited. fThe excitation of the electro-magnet draws thereto the armature 30, whereby a shunt circuit is established, and current flowing from the conductor 18 through the coil 25, conductors 27 and 26, core 24, armature 30 and conductor 19 to the negative pole-0t the battery maintains the magnetization of the electro-magnet 25 and current flowing through the conductor 21, bell 22,. conductor 23, core 24, armature 30 and conductor 19 continues the operation of the bell, even though the contact between-the rod .13 and the contacts 16 be broken. A portion-of the current flowing in the conductor 18 also passes through the electro-n'iagnet 12,.branch conductor 18, conductors 29 and to the core 2 1- and thence to the negative pole oi the battery, thereby maintaining closed the circuit of the battery 31 in the event the rod 13 is disconnected from the contact 16. The flow of current through the conductor 18 energizes the electro-magnet 12 which draws up the armature 11 out of engage ment with the finger 10, whereby the rollers 3 and 7 are released and the curtain quickly drawn across the window by the unwinding of the springs 9 and9. The engagement of the armature 11 with the core of the electro-magnet 12 closes the circuit of the battery 31 through the shocking vibrator 35, which isthereby operated anddischarges electricity through the branch conductor 36 bracket 4, roller 3 to the curtain 5,, and through the conductor 37 to ground and through the conductor 38 to the tin foil 39. Consequently when an intruder touches the charged curtain the circuit of the vi brator is closed through the tin foil, or ground, and the intruder receives a severe shock and is held fast to the curtain.

Having described my invention, I claim: 1. In a protective system of the character described, the combination with a closure, of a curtain, means for operating said curtain, and mechanism comprising an automatically movable device normally restrained from movement by said closure for rendering said operating means inoperative.

2. In a protective system of the character described, the combination with a closure,

of a curtain,*1neans for automatically moving said curtain, and electro-magneti mechanism for controlling said means and comprising a circuit normally held open by the engagement of a member thereof with said closure. 7

3. In a protective system of the character described, the combination with a sheet of material, ot a curtain, means for automatically operating said curtain, electro-magnetic mechanism for controlling said means and comprising a circuit containing a movable contact member adapted to be actuated by the disturbance 0t said sheet of material, and means for electrically charging said curtain.

i. In a protective system of the character described, the combination with a closure, of a curtain comprising conducting material, and means comprising a device actuated by the disturbance of said closure for electrically charging said curtain.

5. The combination with a closure,of a protective system comprising an electric circuit and means for controlling it and a sec ond circuit controlled by said first named circuit and comprising a shocking vibrator, normally disconnected conductors electrically connected with said vibrator, and a member adjacent to said closure to which electricity is discharged when said last named conductors are connected.

6. In a protective systemot the character described, an electric circuit containing electro-magnetic mechanism, means for controlling said circuit, a second circuit controlled by said electro-magnetic mechanism and containing a shocking vibrator, and a conducting curtain, connected with said vibrator. y

'In testimony-whereof I have hereunto set my name this Qatth day of January, 1921.

TRAVILLA G. GETTELL. 

